A corpora



' W. J. DOYLE AND J. J. WOLLENHAUPT.

' FURNACE.

APPLICATION FILED MAR. 23 1915. 1,346,801 Patented July 13, 1920.

I /d I! l I/ II i \g 2 z UNITED STATES PATENT OFFICE.

WILLIAM J. DOYLE AND JUSTUS J. WOLLENHAUPT, OF CINCINNATI, OHIO, ASSIGNORS 'ro um uomron s'rovn & won or onro.

RANGE COMPANY, OF CINCINNATI, OHIO, -A CORPORA- FURNACE.

To all whom it may con corn:

Be it known that we, WILLIAM J. DOYLE and J USTUS J. lVoLLnNHAUr'r, citizens of the United States, and residing at Cincinnati, in

the county of Hamilton and State of Ohio,

register to a room immediately above thev furnace and the cool air is returned through the same register to the furnace to be reheated. I

An object of the invention is to provide an insulated and. heat non-radiating partition, comprising manifold spaced casings forming a jacket space interveningly between the hot and cold air passages, to minimize radiation so that the higher temperature in one passage will notmaterially change the temperature in the other and thereby increase the efiiciency of the furnace.

Further objects and features of the invention will be more fully set forth in the description of the accompanying drawing, forming a part of this specification, and in such drawings like characters of reference denote corresponding parts throughout the several views, of which Figure 1 is a central vertical section through the furnace with portions thereof shown in elevation.

Fig. 2 isa section on line 22, Fig. 1.

This invention, as an improvement in furnaces, contains the general features of advantage described :and claimed in Letters Patent No. 1,133,242, 'to William J. Doyle and Justus J. Wollenhaupt, dated March 23rd, 1915, and characteristic to such type of furnace knownto the trade as a pipeless furnace or system of heating,whgrein the furnace serves as a means forwithdrawing the cold air from the connected apartment,

Specification of Letters Patent. Pate ted J l 13 192() Application filed March 23. 1915. Serial No. 16,482.

conveying it to the heater to be heated and nace comprises a unitary structure of heater and hot and cold air passages, connectingv through a register with a room immediately above the furnace. This type offers many advantages, being easily and cheaply installed, compact and simple, reducing cost of manufacture and shipping charges, and as a heater saving in the cost of fuel because heavy firing may be detrimental to a satisfactory operation in quickly establishmg and maintaining a determined de ree of temperature in the rooms to be heate The heated air rises,,forcing the colder air downward, and by the suction of the furnace is drawn into and downwardly through the cold air passage and then passes upwardly into and through the hot air passage around the heater, to be heated and delivered into the room. The air when heated expands, in-' creasing its velocity which has a resulting effect on the velocity of the incoming cool air. lVhen the furnace is started the circulation is relatively active, but gradually slows down, as the air entering the inlet approximates the temperature of the air emerging from the outlet, so that when the predetermined temperature has been attained and rendered substantially uniform throughout the house,the circulation is relatively passive and may be maintained by running the furnace at a relatively low heat. Thus the difference in degrees of temperadetermines the velocity of the air which is automatically accelerated when the variance in temperature is marked and is more sluggish when the temperature approaches degrees of uniformity. v g

It is, therefore, essential that the tem perature of the incoming air is not materially changed by radiant heat from the heater or passage partitions, for if such cold air passage were unduly heated, it would interfere with the air circulatedwhen'both passages would become radiant heat conductors. I

The heater in its construction comprises time between the incoming and outgoing air the ashpit 1, lire-b); 2, combustion chamber casing 3 and hot-air radiator 4 of separable sections detachably united, following an established practice in the art. 4: has its axis disposed eccentrically to the axis of the combustion chamber casing and fire-box to centralize the radiator sections relatively to the casings and bring the remaining sections of the heater into closer proximity with the face plate 5, to reduce the length of the passages 6 and 7 connecting the heater and face plate. The plate provides a support for the doors of said passages and other furnace controlling parts. The heater is surrounded by a manifold number of casings spaced from each other and from the heater, including an outer casing 8 fixed to andsupported upon the base plate 9 and to the face plate 5. p

The casing is somewhat contracted at upper portion with the upwardly and inwardly tapering portion 10 and terminates in a vertically extended portion 11. which connects with a register 12. A. second casing 13 is concentrically supported within the outer casing 8 and spaced therefrom to provide a cold. air passrge 14. This second casing 13 is suitably supported to extend slightly below the heating zone and connect said passage l l with the hot-air chamber or passage 15 between heater and casing 1 3. The upper portion of said second casing 18 is similar in shape to that of the outer cas ing', having the upwardly and inwardly tapering cone portion 16, terminating with the vertically extended portion 17 ted with the register 12. Goncentricallv within the inner casing 13, spaced then i 'n and suitably supported, we provide a third cat ing l8 providing a jacket 1 assage 15) open at the top and bottom. The intermediate passage 19 communicates at its upper end with the hot air passage to escape and maintain a circulation or? air through said passage. The easing 18 and intermediate passage provide insulation for the casing 13. In. the actual construction of furnace, the degree or width of spacing between the casings 18 and 18 proportionately compared. is considerably greater than the space between the casings l3 and 18 shown in the draiw ings. This in the drawings is merely for the purpose of more conveniently illustra"- ing. Thus a portion of the cold air from passage 14 enters the intermediate passage 1!), circulating upward as its temperature changes from the heat radiating from the casing 18, with the temperature controlling the velocity of the air. In such construe tion of furnace, the temperature of the incoming'cold air is not materially changed in Xaroopa eqq 9105919111 pun pr efinssed our;

The radiator of the air is not retarded by the change of its temperature in passing through said passage. The inner casing 13 connects with the face plate from a wall around the feed and ash-pit snouts 6 and 7 respectively, proriding a pocket or chamber communicating with the hot-air passage.

Having described our invention, we 'lai1n:-

1. The combination of a furnace body comprising an ash-pit, combustion chamber and radiator, having laterally extending ash and feed snouts and products of combustion conduit, respectively, three separated casings surrounding said heater body, a single siu erposeddoor register with which the upper ends of said casings communicate, to constitute an outer, downward, coldnir intake and passage and an inner, upward hot-air passage and outlet, the outer rasing extending to the furnace base to inclese the heater, the two inner casings prov at the bottom connnunication bot 'een the outer cold-tux passage and the heating spaces between the two inner casings and l vcen the inner casing and the heater body, a ter minal plate for the ash and lierd snouts nnected to the outer casing, the two inner rasings having cut-out portions ronstitutiug a feed snout pocket, the cold-air passage formed by the two outer casings, beii'ig separated from said pocket to throw the heat radiated from the feed snout into an ascending hot-air passage.

2. in a hot-air single register :liurnace, the ronibination with a heater having projecting ash-pit and combustion chamber pas-- sages, and three casings one within another in a spar/d relation and surroundinc; ichoater, constituting an outer casing extending from the base of the heater to a register in the vdoor above the heater, an intoriueiliate asing extending from the register to a point slightly above the base of the heater to provide an inner upward hot-air passage around. and above the heater, and with said outer casing providing an outer downward cold-air passage c mmiunicating at the base with the upward passage, and the third or inner casing forming a )rotector for the intermediate 'casingand therewith forms a narrow intermediate upward air passage or insulating space. i

In witness whereof we hereunto subscribe our name. as attested by the two subscribing witnesses.

WI T iL'I' A M J DOYLE. JUSTUS J. "VOLLENHAUPT.

Witnesses Elmira Srnnnn, L. A. BECK. 

